@article{JRAM_1931__164_149752,
     author = {Trygve Nagell},
     title = {Zur {Theorie} der algebraischen {Ringe.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {80--84},
     year = {1931},
     volume = {164},
     zbl = {0001.11801},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1931__164_149752/}
}